Remove variable_excluded_from_dispatch() assertion from mkldnncommon (#92168)
When tracing a model using dynamo, theses assertions fail. Following https://github.com/pytorch/pytorch/pull/29653 and https://github.com/pytorch/pytorch/pull/46371, we think it might be OK to remove these two assertions as well.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/92168
Approved by: https://github.com/ezyang
